Reaction tube



FIG. 1 is a front, top and left side perspective view of a reaction tube showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a cross sectional view taken along line 8-8 in FIG. 2 thereof; and,

FIG. 9 is an enlarged view of area 9 indicated in FIG. 3 thereof.

The broken lines in the drawings are for the purpose of illustrating the boundaries of the portions shown enlarged in the views and form no part of the claimed design. 

CLAIM The ornamental design for a reaction tube, as shown and described. 